Side frame for a chair



FIG. 1 is a side elevation view of a side frame for a chair showing my design;

FIG. 2 is an elevation view showing the side opposite that shown in FIG. 1;

FIG. 3 is a front elevation view;

FIG. 4 is a rear elevation view; and

FIG. 5 is a top plan view thereof. 

The ornamental design for a side frame for a chair, as shown. 